Don't animate bubbles in the initial state update

When launcher receives the initial bubble state update from sysui, don't animate the bubbles. The initial update is sent when bubble bar is created and not when new bubbles are created.

Flag: ACONFIG com.android.wm.shell.enable_bubble_bar DEVELOPMENT
Bug: 280605846
Test: manual
Change-Id: I74b09220be22d7382fa6d7c1351d5e60a799a054